yes there is two kinds of props you can use for this, only one kind I have seen on outboard drives (maybe it would work on outboard engines too) it is called self feathering prop, it folds up into itself when at zero RPM and returns to its drive position when rpm is above 30 RPM. I have seen them as small as 4 -1/2 inches.
you don't have to take the drive out of the water or put your hands in the water to any adjustment, it loses a little in drive but works well. _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
